发明名称 |
LOCK BOLT MADE OF STEEL PIPE |
摘要 |
A sleeve 10 for introduction of a pressurized fluid, which is attached to a rockbolt main body 1, comprises a cylindrical projecting part 11 of a large diameter and a bearing-plate-holding part 12 of a diameter smaller than an aperture of a bearing plate 6. The projecting part 11 and the bearing-plate-holding part 12 preferably has the same inner diameter. When the rockbolt main body 1 is embedded in a bedrock or ground, the bearing plate 6 locates on an edge of a rockbolt-setting hole of the bedrock or ground, and the bearing-plate-holding part 12 extends through the bearing plate 6 into the rockbolt-setting hole. Since the projecting part 11 and the bearing plate 6 are disposed on a sprayed concrete layer, a projection height of the rockbolt is remarkably decreased. Consequently, lining concrete 8 is applied onto the sprayed concrete layer with ease, and the bedrock or ground is reinforced with high reliability. |
申请公布号 |
EP1693550(A4) |
申请公布日期 |
2009.09.30 |
申请号 |
EP20040771227 |
申请日期 |
2004.07.29 |
申请人 |
NISSHIN STEEL CO., LTD. |
发明人 |
IWASAKI, TATSUROU;NAKATA, MASAHIRO;SHIROMA, HIROMICHI;ITOU, TETSUO;OOSHIMA, KENJI;TANASE, HIROYUKI;NAKAKO, TAKEFUMI;YOSHIDA, TAKEYUKI;KITTAKA, TOSHIHARU |
分类号 |
E21D20/00;C23C2/06;E21D21/00 |
主分类号 |
E21D20/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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